Take-down screw.



' Patented Feb. 25,1902:

(no anaal.) i

Srntrns Ayrsivtr einen.

THOMAS C. JOHNSON, OE NEW HAVEN, CONNECTICUT, ASSIGNOR TO THEVVINCHESTER REPEATING ARM-S CO., OF NEV HAVEN, CONNECTICUT,

A CORPORATION.

TAKE-DOWN SCREW.

SPECIFICATION forming -part of p Letters Patent No'. 694,156, datedFebruary 25, 1902.

Application filed August 116, 1901. Serial No. 72,237. (No model.)

To LLZZ 'whom it may concern: g

Beit known that I, THOMAS O. JOHNSON, of

New Haven, in the county of New Haven and State of Connecticut, haveinvented a new and useful Improvementin Take-Down Guns ;A

and I do hereby declare the following, when taken in connection with theaccompanying drawings and the letters of reference marked thereon, to bea full, clear, and exact description of the saine, and which lsaiddrawings constitute part of this specificatiomand represent, in-

Figure 1, a broken View, in vertical section, of one form which myinvention may assume; Fig. 2, a detached view in front elevation of thetake-down screw and safety-dog; Fig. 3, a detached plan view of thescrew; Fig. 4, a corresponding view of the safety-dog.

My invention relates to an improvement in take-down firearms, andconstitutes an improvement upon the arm for which under date ot' April26, 1901, I filed an application serially numbered 57,563, the object ofmy present invention being to firmly secure 4the take-down screw againstdisturbance when in its home position.

With these ends in view my invention con` sists in the combination, withthe take-down screw of a take-down gun, of a safety-dog coacting withthe screw to lock it in its home position. r

My invention further consists in certain details of construction andcombinations of parts, as will be hereinafter described, and pointed outin the claims.

In carrying out my invention, as herein shown, I employ a safety-dog 2,formed with a tooth 3, adapted to engage with the teeth 4 of a ratchet5, formed at the inner end of the knurled head 6 of the take-down screw7. The said dog 2 is' fopgned with a forwardlyextending arm 8, theextreme forward end of which receives a pivot-pin 9, located in theupperprong 10 of the tang of the gun, the dog vibrating upon the saidpivot-pin. Y said dog is locatedv in a suitable recess 11, cut into theupper face of the saidprong, and is maintained in its lifted orscrewflocking position by means of a spiral spring 12, inserted into asocket 13, leading out of the bottom of The the outer end of the recess1l. The upper end of this spring enters a shallow recess 14, formed inthe outer end of a dog, which normally projects above the upper face ofthe upper tang. To retire the dog and unlock the screw, the user of thearm places his iinger upon the outer end of the dog and vpressesdownward upon it, whereby the tension of the spring 12 is overcome andthe dog swung down upon its pivot 9, s0 as to clear its tooth 3 from thetooth 4 of the ratchet 5 with which it is engaged at the time. The screw7 may then be unscrewed. In unscrewing the screw the downward pressureof the dog upon the spring must be maintained until after the screw hasbeen unscrewed sufficiently to clear the tooth 4 of the ratchet 5 fromthe tooth 3 of the dog, after which the screw may be unscrewed withoutany reference to the dog. On the other hand,whe n the screw is beingturned inward the teeth 4 of the ratchet 5 simply snaps over the tooth 3of the dog on account of their beveled shape, as clearly shown in Fig.2. The screw 7, as herein shown, enters into an internally-threadedtake-down bushing' 15, which is also externally threaded to adapt it tobe screwed in'to a threaded opening 16, formed for its reception in therear end of the receiver 17, which is formed with a rearwardly-openingrecess 18 for the reception of an upwardly-extending take-down armorlug\ 19, formedintegral with the said upper prong 10 and carrying thescrew 7, which is formed with a long stem or shank 7 a, passing throughan opening 20, formed to receive it in the arm or lug 19, the inner faceof which is formed with a recess 199 for the reception of the outer endof the bushing 15. The screw is free to play back and forth in theopening 20 within the limits of the shank 7 of the said screw, which isprevented from being pulled rearwardly ont of the arm 19 by means of atransversely-arranged stop-pin 21, which is inserted into the screwafter it has been passed through the opening 20 in the arm 19. This pinis longer than the diameter of the screw 7 and engages with a shoulder22, formed at the rear end of the opening 20, as shown in Fig. 1.

It is apparent that my invention is not limited to use in connectionwith the particular construction shown and described herein, but that itcomprehends the use of a safety locking-dog in conjunction with anytake-down screw in a take-down gun. When the safetydog is performing itsfunction, it positively holds the take-down screw against rotation inthe directionl of unscrewing from any cause, such as the jarring offiring and handling. I would therefore have it understood that I do notlimit myself to lthe exact construction and arrangement of parts hereinshown and, described, but hold myself at liberty to make suchalterations as fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a take-down gun, the combination with a gun-frame having a recessformed in it, of a takedown screw, and a safety-dog located within thesaid recess and formed with a tooth adapted to engage with a screw tohold the same against unscrewing rotation when in its home position.

2. In a take-down gun, the combination with the receiver and the tangthereof, of a take-down screw mounted in the tang and entering thereceiver, and a safety-dog located in a recess formed in the tang andcoacting with the screw for locking the same against unscrewing when inits home position.

3. In a take-down gun, the combination with a take-down screw, of asafety-dog located within a recess in a portion of the frame of the gun,and formed with a tooth adapted to engage with the screw to hold thesame against unscrewing rotation when in its home position, and aspring' coacting with the dog to hold the same in its locking position.

4. In a take-down gun, the combination with the receiver thereof, of abushing located therein, a tangformed with an upwardly-projecting armand with a recess, a take-down screw mounted in the said arm, havingfree longitudinal movement therein, and adapted to enter the saidbushing for firmly binding the receiver to the tang, and a safety-doglocated in the recess of the tang, and coacting with the screw forlocking the same against unscrewing rotation when in its home position.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

THOMAS C. JOHNSON.

Witnesses:

FREDERIC C. EARLE, J. H. SHUMWAY.

